1001098501 has 4 divisors (see below), whose sum is σ = 1078106092. Its totient is φ = 924090912.

The previous prime is 1001098493. The next prime is 1001098519. The reversal of 1001098501 is 1058901001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1058901001 = 6619 ⋅159979.

It can be written as a sum of positive squares in 2 ways, for example, as 130553476 + 870545025 = 11426^2 + 29505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001098501 - 2³ = 1001098493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001098541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38503776 + ... + 38503801.

It is an arithmetic number, because the mean of its divisors is an integer number (269526523).

Almost surely, 2^1001098501 is an apocalyptic number.

It is an amenable number.

1001098501 is a deficient number, since it is larger than the sum of its proper divisors (77007591).

1001098501 is an equidigital number, since it uses as much as digits as its factorization.

1001098501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77007590.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1001098501 is about 31640.1406602436. The cubic root of 1001098501 is about 1000.3660330035.

Adding to 1001098501 its reverse (1058901001), we get a palindrome (2059999502).

The spelling of 1001098501 in words is "one billion, one million, ninety-eight thousand, five hundred one".